Of HYA - copper conductors, solid polyolefin insulated aluminum bonded jacket telephone cable
HYAC - copper conductors, solid polyolefin insulated aluminum bonded sheath self-supporting telephone cable
HYAT - copper conductors, solid polyolefin insulation filled moisture barrier polyethylene sheathed telephone cable
HYA53 - copper conductors, solid polyolefin insulation and aluminum sheath single comprehensive package corrugated steel tape armored and mounted polyethylene sleeve if cable

Telephone cable uses:
The HYA type HYAC type of local telephone cables for telephone exchange district relay trunk and design of the city, then cable, can be used to transmit audio signals and integrated services digital network of 2B + D, the rate and the following digital signals, also can be used to transfer 2048 kbit / 8 digital signal or analog signal below 150KHz.
HYA-type telephone cable is mainly used for pipe laying, can also be used for overhead, it requires a suspension wire, HYAC type cable for aerial, without using the hanging wire and hooks.
HYA53 type telephone cable to improve the mechanical strength and anti-erosion ability of the cable can be used either way, laying more suitable for direct burial laying in rocky areas.
Using the temperature are: -30 ℃ ﹀ the +60 ° C

Telephone cable product mix:

Conductor: GB3953 stipulated TR soft round copper wire, with a nominal diameter: 0.4,0.5,0.6,0.7,0.8,0.9 mm.
Insulation: The insulation level of high density polyethylene or polypropylene, insulated wire in accordance with the full spectrum color, identifying marked insulation colors meet GB6995.2 provisions.
Pair: the insulation of the two different color singlet according to different pitch twisted pairs to minimize crosstalk and with specified color combinations to identify the pair.
Cable core strands: a number of basic units or super units, each unit with the provisions of Chromatography tie around the bar, in order to identify the different units. Cable 100 pairs and above, plus a 1% preparation line, but up to no more than six pairs.
The cable core package with: non-hygroscopic tape wrapped the lock cylinder.
Aluminum bonded integrated sheath:
Shield: 0.30mm thick double-sided coated aluminum, vertical package in the cable outside of the pericardium with both sides of the overlap is greater than 6mm and bonded together more than 400 pairs of longitudinally corrugated.
Jacket: black low density polyethylene
Identification tag and length: The cable surface printed with a permanent identification mark, mark an interval of one meter, tag content:
Models, specifications, name, trademark, year of manufacture, and meter.

The telephone cable HYA400-500-600-700-800-1000-1200-1600-2000 × 2 × 0.4 diameter (main indicators)

Technical requirements: YD/T322-1996 standard requirements issued by the Ministry of Posts and Telecommunications.